Htydjtk

I wanna draw a ground with three lines (see Fig. a.), but in circuitikz, the ground is associated with four lines (see Fig. b.). My question is that is it possible to draw a nice ground with three lines in circuitikz or others?

It's not too difficult to suppress the fourth line in ground nodes:

documentclass{article} 

usepackage{circuitikz}



makeatletter

pgfdeclareshape{ground}{

    anchor{center}{

        pgfpointorigin

    }

    behindforegroundpath{      

        pgf@circ@res@step=ctikzvalof{monopoles/ground/width}pgf@circ@Rlen



        pgfscope       

            pgfpathmoveto{pgfpointorigin}

            pgfpathlineto{pgfpoint{0pt}{-pgf@circ@res@step}}

            pgfusepath{draw}



            pgfstartlinewidth=pgflinewidth

            %pgfsetlinewidth{pgfkeysvalueof{/tikz/circuitikz/bipoles/thickness}pgfstartlinewidth}



            pgfpathmoveto{pgfpoint{-pgf@circ@res@step}{-pgf@circ@res@step}}

            pgfpathlineto{pgfpoint{pgf@circ@res@step}{-pgf@circ@res@step}}

            pgfusepath{draw}



            pgfsetlinewidth{pgfstartlinewidth}

            pgfpathmoveto{pgfpoint{-.8pgf@circ@res@step}{-1.2pgf@circ@res@step}}

            pgfpathlineto{pgfpoint{.8pgf@circ@res@step}{-1.2pgf@circ@res@step}}

            pgfpathmoveto{pgfpoint{-.6pgf@circ@res@step}{-1.4pgf@circ@res@step}}

            pgfpathlineto{pgfpoint{.6pgf@circ@res@step}{-1.4pgf@circ@res@step}}

%           pgfpathmoveto{pgfpoint{-.4pgf@circ@res@step}{-1.6pgf@circ@res@step}}

%           pgfpathlineto{pgfpoint{.4pgf@circ@res@step}{-1.6pgf@circ@res@step}}

            pgfsetcolor{pgfkeysvalueof{/tikz/circuitikz/color}}

            pgfusepath{draw}





            pgfsetlinewidth{pgfstartlinewidth}



        endpgfscope

    }



}

makeatother



begin{document}

begin{circuitikz}

draw (0,0) node[ground] (g) {};

end{circuitikz}

end{document}

One can always draw it manually using pure TikZ:

documentclass{article}

usepackage{subcaption}

usepackage{tikz}

begin{document}

begin{figure}[htbp]

    centering

    begin{subfigure}[t]{2cm}

        centering

        begin{tikzpicture}

            draw (0,0)--(0,1) (0,1.2)--(0,2.2);

            draw[thick] (-.3,1.2)--(.3,1.2) (-.3,1)--(.3,1);

            draw (-.2,0)--(.2,0) (-.125,-.1)--(.125,-.1) (-.05,-.2)--(.05,-.2);

        end{tikzpicture}

        caption{}

    end{subfigure}

    begin{subfigure}[t]{2cm}

        centering

        begin{tikzpicture}

            draw (0,0)--(0,1) (0,1.2)--(0,2.2);

            draw[thick] (-.3,1.2)--(.3,1.2) (-.3,1)--(.3,1);

            draw (-.2,0)--(.2,0) (-.15,-.1)--(.15,-.1) (-.1,-.2)--(.1,-.2) (-.05,-.3)--(.05,-.3);

        end{tikzpicture}

        caption{}

    end{subfigure}

    caption{}

    label{fig:my_label}

end{figure}

end{document}